Spend some time on the site researching using the site search function. There is also a list of method megathreads in the Resource Compilation.
Also, we can't guide someone to suicide, but we can answer questions along the way as you figure out what methods interest you, but you have to do your due diligence as well.
From the Rules and FAQ:
Just as a disclaimer, NO ONE on this site will advise you on how to painlessly and successfully end you're life. Helping someone die, including advising and including specifics, is against the rules of the site and is completely unethical. The site offers information and respects the choice of an individual's decisions and the onus is on the individual to find the information necessary, which helps in making their decision.
If you're looking for methods and resources on going down a certain path, then please use and take advantage of both the search function of the site and the resources section of the forum as both are you're friends, in finding information. please don't be dependent on asking others for information. you can find the resources section here: Resources